20895520

素因数分解:

$2^5\times 5^1\times {\mathrm{73}}^1\times {\mathrm{1789}}^1$

素因数の和:1877

約数の個数: 48

約数和(自身を含む): 50069880

約数和(自身を除く): 29174360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 73, 80, 146, 160, 292, 365, 584, 730, 1168, 1460, 1789, 2336, 2920, 3578, 5840, 7156, 8945, 11680, 14312, 17890, 28624, 35780, 57248, 71560, 130597, 143120, 261194, 286240, 522388, 652985, 1044776, 1305970, 2089552, 2611940, 4179104, 5223880, 10447760, 20895520]

約数ペア:

[(1, 20895520), (2, 10447760), (4, 5223880), (5, 4179104), (8, 2611940), (10, 2089552), (16, 1305970), (20, 1044776), (32, 652985), (40, 522388), (73, 286240), (80, 261194), (146, 143120), (160, 130597), (292, 71560), (365, 57248), (584, 35780), (730, 28624), (1168, 17890), (1460, 14312), (1789, 11680), (2336, 8945), (2920, 7156), (3578, 5840)]